linux64

Synopsis

add an example, a script, a trick and tips

: email address (won't be displayed) : name

Step 2

What command(s) is this example for ?

Thanks for this example ! - It will be moderated and published shortly.

Feel free to post other examplesOops ! There is a tiny cockup. A damn 404 cockup. Please contact the loosy team who maintains and develops this wonderful site by clicking in the mighty feedback button on the side of the page. Say what happened. Thanks!

examples

description

setarch
This utility currently only affects the output of uname -m.
For example, on an AMD64 system, running ’setarch i386
program’ will cause ’program’ to see
i686 (or other relevant arch) instead of
x86_64 as machine type. It also allows to set various
personality options. The default program is
/bin/sh.

options

-v,
--verbose

Be verbose.

-h,
--help

Display help (it is also
displayed when setarch takes no arguments).

--uname-2.6

Causes the program to see a
kernel version number beginning with 2.6.

-3,
--3gb

Specifies that processes should
use a maximum of 3GB of address space on systems where it is
supported (ADDR_LIMIT_3GB).

-B,
--32bit

Turns on ADDR_LIMIT_32BIT.

-F,
--fdpic-funcptrs

Userspace function pointers
point to descriptors (turns on FDPIC_FUNCPTRS).

-I,
--short-inode

Turns on SHORT_INODE.

-L,
--addr-compat-layout

Changes the way virtual memory
is allocated (turns on the ADDR_COMPAT_LAYOUT).

-R,
--addr-no-randomize

Disables randomization of the
virtual address space (turns on ADDR_NO_RANDOMIZE).

-S,
--whole-seconds

Turns on WHOLE_SECONDS.

-T,
--sticky-timeouts

Turns on STICKY_TIMEOUTS.

-X
--read-implies-exec

Turns on READ_IMPLIES_EXEC.

-Z,
mmap-page-zero

Turns on MMAP_PAGE_ZERO.

availability

The setarch command is part of the util-linux package and is
available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.